EP3215376A1 - Reduzierung des verschleisses in kupplungsvorrichtungen - Google Patents
Reduzierung des verschleisses in kupplungsvorrichtungenInfo
- Publication number
- EP3215376A1 EP3215376A1 EP16748503.6A EP16748503A EP3215376A1 EP 3215376 A1 EP3215376 A1 EP 3215376A1 EP 16748503 A EP16748503 A EP 16748503A EP 3215376 A1 EP3215376 A1 EP 3215376A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- chain
- wear member
- recess
- hitch
- wear
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60D—VEHICLE CONNECTIONS
- B60D1/00—Traction couplings; Hitches; Draw-gear; Towing devices
- B60D1/01—Traction couplings or hitches characterised by their type
- B60D1/04—Hook or hook-and-hasp couplings
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B59/00—Devices specially adapted for connection between animals or tractors and agricultural machines or implements
- A01B59/002—Details, component parts
- A01B59/006—Latched hooks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60D—VEHICLE CONNECTIONS
- B60D1/00—Traction couplings; Hitches; Draw-gear; Towing devices
- B60D1/14—Draw-gear or towing devices characterised by their type
- B60D1/18—Tow ropes, chains or the like
- B60D1/187—Tow ropes, chains or the like characterised by the connection to the towing vehicle or to the trailer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60D—VEHICLE CONNECTIONS
- B60D1/00—Traction couplings; Hitches; Draw-gear; Towing devices
- B60D1/58—Auxiliary devices
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B59/00—Devices specially adapted for connection between animals or tractors and agricultural machines or implements
- A01B59/04—Devices specially adapted for connection between animals or tractors and agricultural machines or implements for machines pulled or pushed by a tractor
- A01B59/042—Devices specially adapted for connection between animals or tractors and agricultural machines or implements for machines pulled or pushed by a tractor having pulling means arranged on the rear part of the tractor
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B61/00—Devices for, or parts of, agricultural machines or implements for preventing overstrain
- A01B61/02—Devices for, or parts of, agricultural machines or implements for preventing overstrain of the coupling devices between tractor and machine
Definitions
- This disclosure relates to the field of hitches for connecting a towed vehicle to a towing vehicle and in particular reducing wear and related expenses in such hitches.
- Pintle hook type hitch apparatuses typically comprise a hook assembly with a vertically oriented pin mounted to the towing vehicle, such as a truck.
- the pintle hook assembly has a bend portion extending rearward from a base portion that is attached to the towing vehicle and a pin extending upward from the rear of the bend portion.
- the hitch tongue of the towed vehicle has a ring on the forward end that is dropped down on the pin which extends up through the hole in the ring and the ring rests on top of the bend portion at the bottom of the pintle hook.
- a retainer is connected to the top of the pin over the gap between the pin and the base portion to prevent the ring from moving upward off the pin.
- Such pintle hook hitch apparatuses are disclosed for example in United States Patent Numbers 6,139,043 to Gries, et al. and 5,332,250 to Thorwall, et al.
- Connecting mechanisms for trailers and like towed vehicles take a variety of forms.
- clevis and tongue mechanisms and ball and socket mechanisms are also common.
- the hitch apparatus include a safety chain or like tether connected between the vehicles as well to keep the vehicles connected if the hitch connection mechanism fails.
- Trailer safety chains are described in United States Patent Numbers 6,179,317 to Hurst, et al. and 6,279,939 Austin.
- the two separate chains provide redundancy in case one chain fails.
- a problem with safety chains is that the location of the attachment points for the chains on the towing vehicle vary with the different towing vehicles used. The distance from the point where the trailer hitch member engages the hitch member of the towing vehicle can vary considerably from one towing vehicle to another. Thus the chains in some cases can be too short to reach the attachment location on the towing vehicle.
- the present disclosure provides a pintle hitch apparatus that overcomes problems in the prior art.
- Pintle hook hitch apparatuses are used in a wide variety of vehicles, from light trailers to large highway trailers weighing many tons.
- the pintle hook In the larger vehicles, the pintle hook is large and costly, and is subject to considerable wear from the forces exerted by the ring and the constant relative movement between the ring and the hook.
- the material of the hook is worn away and it is necessary to monitor the wear on the hook in order to ensure sufficient material is present to support the ring during travel. When the material has worn away to an unsafe degree the pintle hook must be replaced with a new one.
- the portion of the pintle hook that is subjected to wear is really quite small, being the top surface of the bend portion which supports the downward force of the weight on the ring, and the lower portion of the front surface of the pin, which bears against the ring to provide the forward force to tow the vehicle.
- the present disclosure thus provides a pintle hitch apparatus comprising a pintle hook comprising a base portion adapted at a front end thereof for attachment to a towing vehicle, a bend portion extending rearward from the base, and a pin extending upward from a rear end of the bend portion.
- a recess is defined in a top surface of the bend portion, and a wear member is releasably attached in the recess such that a top surface of the wear member is above a top surface of the bend portion.
- the present disclosure further provides a safety chain apparatus for towed vehicles that overcomes problems in the prior art.
- the present disclosure provides a safety chain apparatus for a hitch assembly, the hitch assembly comprising a hitch member configured to connect a towing vehicle to a towed vehicle.
- the apparatus comprises a chain comprising a length of chain links, the chain attached at a rear end thereof to the towed vehicle and adapted at a front end thereof for releasable attachment to the towing vehicle.
- An engagement device is attached to the hitch member and configured to engage a selected link of the chain and secure the selected link in a support location where the chain is above a road surface.
- the engagement device is configured to release the selected link from the support location when a force exerted on the engagement device by the chain exceeds a release force.
- the safety chain apparatus of the present disclosure secures one selected link of the chain in a supported location where slack portions between the engagement device and the vehicles are above the road surface. If the link is improperly selected such that one of the slack portions tightens while maneuvering the vehicles and exerts any significant force on the engagement device, the engagement device will allow the selected link to move away from the support location in response to the force, preventing damage to the hitch and vehicles. DESCRIPTION OF THE DRAWINGS
- Fig. 1 is a schematic perspective view of an embodiment of the pintle hitch apparatus of the present disclosure with the wear member removed from the recess;
- Fig. 2 is a schematic top view of the embodiment of Fig. 1 with the wear member installed in the recess;
- Fig. 3 is a schematic side view of the embodiment of Fig. 1 with the wear member removed from the recess;
- Fig. 4 is a schematic side view of the embodiment of Fig. 1 with the wear member installed in the recess
- Fig. 5 is a schematic side view of the embodiment of Fig. 1 with the wear member installed in the recess and a hitch ring supported on the pintle hook;
- Fig. 6 is a schematic side view of an embodiment of a safety chain apparatus of the present disclosure.
- Fig. 7 is a schematic top view of the embodiment of Fig. 6;
- Fig. 8 is a schematic rear view of the right and left engagement devices engaged in selected links of the right and left chains;
- Fig. 9 is a schematic side view of one of the engagement devices engaged in a selected links of one of the chains;
- Fig. 10 is a schematic side view of the engagement device of the embodiment of Fig. 1 in original form shaped to engage and hold the selected link in the support location;
- Fig. 11 is a schematic side view of the engagement device of the embodiment of Fig. 1 bent out of the original form, releasing the selected chain link from the support location;
- Fig. 12 is schematic rear view of an alternate engagement device where the faster breaks when the release force is exceeded.
- Figs. 1 - 5 schematically illustrate an embodiment of a pintle hitch apparatus 1 of the present disclosure.
- the apparatus 1 comprises a pintle hook 3 such as is known in the prior art comprising a base portion 5 adapted at a front end thereof for attachment to a towing vehicle 7 by bolts 9 or like fasteners.
- a bend portion 11 extends rearward from the base portion 5, and a pin 13 extends upward from a rear end of the bend portion 11.
- a mechanism is also provided to prevent the ring of towed vehicle hitch from moving up and off the pin 13.
- Several such mechanisms are known in the prior art and can be used with the present pintle hitch apparatus 1, and are not further illustrated.
- a recess 15 is defined in a top surface of the bend portion 11.
- the recess 15 extends upward along a lower portion of a front side of the pin 13.
- a wear member 17 is releasably attached in the recess 15 such that a top surface 17A of the wear member 17 is above a top surface 11A of the bend portion 11 that a front surface 17B of the wear member 17 is forward of a front surface 13A of the pin 13.
- the base portion 5 comprises right and left base plates 1 R, 19L extending upward from a front end of the bend portion 11 and the recess 15 extends forward between the base plates 19, and the wear member 17 extends forward in the recess 15 between the base plates 19.
- the base portion 5 defines a base fastener aperture 21 between the right and left base plates 19R, 19L, and the wear member defines a corresponding wear fastener aperture 23 that is aligned with the base fastener aperture 21 when the wear member 17 is in the recess 15, and comprising a fastener extending through the base fastener aperture and wear fastener aperture to releasably attach the wear member in the recess
- the base portion 11 and the wear member 17 define corresponding fastener apertures 21, between the base plates 19, and a fastener 23 extends through the fastener apertures 21 to releasably attach the wear member 17 in the recess 15.
- the wear member 17 is provided by a steel plate with a width WP substantially equal to a width WR of the recess 15 so that there is minimal relative movement between the wear member 17 and the base portion 5 of the apparatus 1.
- the wear fastener aperture 23 in the wear member is square, and the fastener is provided by a carriage bolt 25 with a square shank section 27 engaged in the wear fastener aperture 23.
- a nut 29 is engaged on the end 31 opposite the square shank section 27 and bears against the base portion 5.
- the use of the carriage bolt 25 in the square wear fastener aperture 23 allows the nut 29 to be tightened or loosened without the need to hold the carriage bolt 25, facilitating removal and replacement of the wear member 17.
- Fig. 5 schematically illustrates the ring 33 of the hitch of a towed vehicle supported on the pintle hitch apparatus 1.
- the weight of the hitch is supported by the bottom of the ring 33 resting on the top surface 17A of the wear member 17.
- the draft forces required to exert a towing force on the ring 33 are exerted by the rear face of the ring 33 bearing against the front surface 17 B of the wear member 17.
- the ring 33 and wear member 17 move with respect to each other causing wear on the ring 33 and the wear member 17.
- the ring 33 will bear against the rear of the base plates 19 however significant wear does not take place because the forces exerted by stopping are only occasional.
- Wear on the wear member 17 is easily determined by monitoring whether the top and front surfaces 17A, 17B of the wear member are still above and forward of respectively the top surface 11A of the bend portion 11 and the front surface 13A of the pin 13.
- the wear member 17 is worn to the extent that the ring begins to bear against the top surface 11A of the bend portion 11 or the front surface 13A of the pin 13 the nut 29 is removed, the carriage bolt 25 pulled out and a new wear member 17 installed.
- the steel plate wear member 17 will have a hardened top surface 17A and front surface 17B such that the Rockwell Scale hardness of the top and front surfaces 17A, 17B of the wear member 17 is greater than a Rockwell Scale hardness of the bend portion 1 1 and greater than a Rockwell Scale hardness of the pin 13.
- the pintle hitch apparatus 1 of the present disclosure thus provides a small, inexpensive, and easily replaceable wear member 17 which can be easily monitored and replaced when necessary, extending the life of the much more expensive pintle hook 3 indefinitely.
- Figs. 6 - 9 schematically illustrate an embodiment of a safety chain apparatus 41 of the present disclosure for a hitch assembly
- a hitch member 43 configured to connect a towing vehicle to a towed vehicle.
- the hitch member could be a hitch member 43A attached to a towing vehicle 45 or a hitch member 43B attached to a towed vehicle 47.
- the apparatus 1 comprises a chain 49 comprising a length of chain links 51.
- the apparatus 1 will comprise right and left chains 49R, 49L, each chain 49 attached at a rear end thereof to the towed vehicle 47 and adapted at a front end thereof for releasable attachment to the towing vehicle 45, commonly by a hook 53 that can be engaged in an aperture on the towing vehicle 45 or the hitch member 43A attached thereto.
- Right and left engagement devices 55R, 55 L are each configured to engage a selected link 51AR, 51AL of the corresponding right and left chains 49R, 45L and secure the selected links 51 A in a support location as illustrated where the chains 49 are above a road surface 57.
- the engagement devices 55 are shown attached to the hitch member 43A attached to a towing vehicle 45, but could as well be attached, as shown in phantom lines as 55R', 55L' in Fig. 7, to the hitch member 43B attached to the towed vehicle 47.
- the engagement devices 55 are configured to release the selected links 51 A from the support location when a force is exerted on the engagement device 55 by the chain 49 that exceeds a release force.
- the selected link 51 A is mistakenly selected such that during a turn the towing vehicle 45 and towed vehicle 47 become oriented such that the slack chain portion 59A between the towing vehicle 45 and the selected link 51 A or the slack chain portion 59B between the towed vehicle 47 and the selected link 51 A tightens such that the chain 49 pulls on the engagement device 55, the engagement device will bend, break, or otherwise release the engaged link 51A from the support location so that damage to the vehicles or a broken chain or like harm does not result.
- the engagement device 55 is configured to bend to release the engaged link 51 from the support location.
- the engagement device 55 is provided by a hanger member formed from a wire hanger rod 61 and attached to the hitch member 43 A with a bolt 63 and configured such that a hook end 65 of the hanger member passes through the selected link 51 A and supports the selected link in the support location.
- the wire hanger rod 61 has a diameter Dl that is less than about one third of a diameter D2 of a chain rod 67 forming the chain links 51.
- the diameter Dl dictates the release force necessary to release the selected link 51 A. Dl only needs to be sufficient to support the loose chain 49 above the road surface, and so can be quite small, with a resultant small release force. It is generally desirable that the diameter Dl be selected such that if either slack portion 59 A or 59B tightens and exerts any significant chain force on the engagement device 55, the wire rod 61 should bend to a general shape shown in Fig. 11 where the hook end 65 is straightened and the selected link has fallen off the engagement device 55. If the chain force is exerted only for a short distance the wire rod 61 may bend only slightly but the selected link 51A may remain on the hook end 61.
- Fig. 12 schematically illustrates an alternate engagement device 55' where the engagement device 55' is attached to the hitch member 43' by a fastener 63' and wherein the fastener 63' is small and light and configured to break to release the selected link 51 from the support location.
- the safety chain apparatus 41 of the present disclosure secures one selected link 55A of the chain 49 in a supported location.
- the link 55 A is selected such that slack portions 59A, 59B between the engagement device 55 and the vehicles 45, 47 are above the road surface 57. If the link 55 A is improperly selected such that one of the slack portions 59A, 59B tightens while maneuvering the vehicles and exerts a force on the engagement device 55 that exceeds a small release force, the engagement device will allow the selected link 55A to move away from the support location, preventing damage to the apparatus 41 and vehicles 45, 47.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Life Sciences & Earth Sciences (AREA)
- Zoology (AREA)
- Soil Sciences (AREA)
- Environmental Sciences (AREA)
- Agricultural Machines (AREA)
- Body Structure For Vehicles (AREA)
- Road Repair (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2881450A CA2881450C (en) | 2015-02-10 | 2015-02-10 | Reducing wear in hitch apparatuses |
PCT/CA2016/000016 WO2016127242A1 (en) | 2015-02-10 | 2016-01-20 | Reducing wear in hitch apparatuses |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3215376A1 true EP3215376A1 (de) | 2017-09-13 |
EP3215376A4 EP3215376A4 (de) | 2018-11-21 |
Family
ID=56611643
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16748503.6A Withdrawn EP3215376A4 (de) | 2015-02-10 | 2016-01-20 | Reduzierung des verschleisses in kupplungsvorrichtungen |
Country Status (5)
Country | Link |
---|---|
US (1) | US20180326802A1 (de) |
EP (1) | EP3215376A4 (de) |
AU (2) | AU2016218895B2 (de) |
CA (2) | CA2881450C (de) |
WO (1) | WO2016127242A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3421273B1 (de) * | 2017-06-30 | 2020-11-18 | VBG Group AB (Publ) | Trägerelement für eine anhängerkupplung und eine anhängerkupplung mit einem derartigen trägerelement |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1837426A (en) * | 1929-06-24 | 1931-12-22 | Ghisolfo August | Draft coupling for agricultural implements |
US2426532A (en) * | 1944-08-03 | 1947-08-26 | Atwood Vacuum Machine Co | Pintle hook for coupling devices |
AT338021B (de) * | 1975-03-11 | 1977-07-25 | Walterscheid Gmbh Jean | Kupplungshaken, insbesondere fur ein dreipunktgestange eines schleppers |
DE2645479C2 (de) * | 1976-10-08 | 1979-02-01 | Jean Walterscheid Gmbh, 5204 Lohmar | Kupplungshaken für die Unterlenker einer Dreipunktanhängevorrichtung an Ackerschleppern |
US4266800A (en) * | 1978-09-18 | 1981-05-12 | Hawkins Wallace H | Tow bar apparatus |
US4467598A (en) * | 1981-04-28 | 1984-08-28 | Wells William M | Energy absorbing trailer chain |
US5039272A (en) * | 1988-02-05 | 1991-08-13 | Century Wrecker Corporation | Safety latch and line system for towing vehicles |
US5362084A (en) * | 1993-03-08 | 1994-11-08 | Edwards Jerry A | Cable carrier for vehicle hitch |
US5415424A (en) * | 1993-09-09 | 1995-05-16 | U-Haul International, Inc. | Trailer surge brake breakaway system |
CA2179585C (en) * | 1995-06-20 | 2007-01-02 | Brian R. Olson | Implement hitch |
US20050039309A1 (en) * | 2003-07-29 | 2005-02-24 | Mccauley John J. | Safety chain assembly having grooved retention mechanism |
US20050150088A1 (en) * | 2004-01-14 | 2005-07-14 | U-Haul International, Inc. | In-line security hook |
US8636297B2 (en) * | 2010-03-13 | 2014-01-28 | M Group, Inc. | Hitch |
CA2763045C (en) * | 2012-01-05 | 2012-08-21 | Power Pin Inc. | Hitch with hardened surfaces |
US9079465B1 (en) * | 2012-05-02 | 2015-07-14 | Oregon Made Plastic Products, Inc. | Trailer hitch accessories |
US20160318361A1 (en) * | 2015-04-30 | 2016-11-03 | Chris Anderson | Trailer hitch ground connector |
US10766319B2 (en) * | 2017-03-10 | 2020-09-08 | Gr Innovations Llc | Chain holder |
-
2015
- 2015-02-10 CA CA2881450A patent/CA2881450C/en active Active
- 2015-02-10 CA CA3040259A patent/CA3040259A1/en not_active Abandoned
-
2016
- 2016-01-20 WO PCT/CA2016/000016 patent/WO2016127242A1/en active Application Filing
- 2016-01-20 EP EP16748503.6A patent/EP3215376A4/de not_active Withdrawn
- 2016-01-20 AU AU2016218895A patent/AU2016218895B2/en active Active
- 2016-01-20 US US15/525,850 patent/US20180326802A1/en not_active Abandoned
-
2018
- 2018-12-20 AU AU2018282414A patent/AU2018282414A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
CA2881450C (en) | 2020-03-10 |
AU2016218895A1 (en) | 2017-06-01 |
AU2016218895B2 (en) | 2018-10-04 |
EP3215376A4 (de) | 2018-11-21 |
CA2881450A1 (en) | 2016-08-10 |
CA3040259A1 (en) | 2016-08-10 |
WO2016127242A1 (en) | 2016-08-18 |
US20180326802A1 (en) | 2018-11-15 |
AU2018282414A1 (en) | 2019-01-17 |
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Legal Events
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DAV | Request for validation of the european patent (deleted) | ||
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RIC1 | Information provided on ipc code assigned before grant |
Ipc: B60D 1/04 20060101ALI20180612BHEP Ipc: B60D 1/18 20060101ALI20180612BHEP Ipc: B60D 1/58 20060101AFI20180612BHEP Ipc: A01B 59/00 20060101ALI20180612BHEP |
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A4 | Supplementary search report drawn up and despatched |
Effective date: 20181018 |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20190518 |